Advancements in Muon Collider Calorimetry: Design, Testing, and Radiation Resistance of the Crilin Calorimeter Prototype

Advancements in Muon Collider Calorimetry: Design, Testing, and Radiation Resistance of the Crilin Calorimeter Prototype

The Crilin calorimeter is a semi-homogeneous calorimetric system that uses Lead Fluoride (PbF2) crystals with UV-extended Silicon Photomultipliers (SiPMs). Proposed for the Muon Collider, it requires high granularity to distinguish signal particles and address substructures for jet identification. A...

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Main Authors: Cantone C., Cemmi A., Ceravolo S., Ciccarella V., Colao F., Di Meco E., Di Sarcina I., Diociaiuti E., Gargiulo R., Gianotti P., Giraldin C., Leonardi E., Lucchesi D., Moulson M., Paesani D., Pastrone N., Saputi A., Sarra I., Scifo J., Sestini L., Soldani M., Soleti R., Tagnani D., Verna A., Zuliani D.
Format: Article
Language:English
Published: EDP Sciences 2025-01-01
Series:EPJ Web of Conferences
Online Access:https://www.epj-conferences.org/articles/epjconf/pdf/2025/05/epjconf_calor2024_00023.pdf
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Summary:The Crilin calorimeter is a semi-homogeneous calorimetric system that uses Lead Fluoride (PbF2) crystals with UV-extended Silicon Photomultipliers (SiPMs). Proposed for the Muon Collider, it requires high granularity to distinguish signal particles and address substructures for jet identification. Anticipating substantial occupancy due to beam-induced backgrounds, simulations indicate a photon flux with an average energy of 1.7 MeV and approximately 4.5 MHz/cm2 fluence rate. Prioritizing time-of-arrival measurements within the calorimeter is crucial for associating clusters with interaction vertices. The calorimeter’s energy resolution is vital for determining jet kinematics. Extensive radiation hardness studies confirm the system’s effectiveness when operating in a challenging radiation environment, with exposure up to 10 kGy/year total ionizing dose (TID) and a neutron fluence equivalent to 1014 neutrons 1 MeV/cm2/year. Prototype (Proto-1), with two layers of 3×3 PbF2 crystals, achieved a timing resolution below 50 ps for energy deposits exceeding 1 GeV during 2023 tests. A comprehensive overview, including mechanics, electronics, and test beam outcomes, is presented. Construction is underway for a larger 9 9 crystal matrix prototype with 5 layers, to be completed in 2024. Testing is scheduled for the summer of 2025.
ISSN:2100-014X

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